将西气东输工程建成高可靠性系统

借鉴系统可靠性分类法的理论和方法研究了西气东输工程 ,进而提出了以下三种解决方案 ,如能实现 ,不但可以将西气东输工程中、下游目前的低可靠性系统建成为高可靠性环网管段及高可靠性环网供、用气系统 ,而且可以节省巨额投资。第一 ,把主管系统建成为高可靠性环网管段 ,即西北天然气与四川天然气在上海并联为一个子系统后 ,该系统就具备了m =2可靠系统的主要条件 ,这样 ,一条管线就可以当作两条不同方向传输的管线使用。第二 ,“三个为零”的节资措施 :①用主管沿线的废弃或正在开采的油气田作储调资源 ,其投资为零 ;②采取用户零储备 ;③为提高系统可靠性所必须采用的 2项发明专利 ,目前使用费为零。第三 ,建成城市用户的高可靠性环网供、用气系统。

ROBUST STABILIZATING FOR A OLASS OF UNOERTAIN NONLINEAR INTEROONNECTED SYSTEMS USING VARIABLE STRUCTURE CONTROL

The robust stabilizating control problem for a class of uncertain nonlinear large-scale systems is discussed. Based on the theory of both input/output (I/O) linearization and decentralized variable structure control (VSC),two-level and decentralized variable structure control laws for this kind of systems are presented respectively,which achieve asymptotically stabilization despite the uncertainties and disturbances. At last,sirnulation of the disturbed two-pendulum system is given to illustrate the feasibility of proposed technique.

The Structure and Stabilization Decom position of Linear Interconnected ControlSystem swith Multidelays

This paper gives a structural concept for linear interconnected control systems with multidelays,which is based on equivalence method of lyapunovs frequency area, a sufficient \{criteria\} is obtained for the interconnected stabilization of linear constant control system with multidelays,at the same time,the estimation of bound both time delays and parametric perturbation are given.